hagel said yes there was a serious security breach. officials say that terrorists are changing their tactics already. but there are a lot of skeptics who still say terrorists know not to use their cell phones, not to logon, that mainly this is embarrassment to the u.s. government. the debate goes on. kate. >> absolutely right. barbara starr at the pentagon. thank you. >>> after a week of intense scrutiny police have charged ex-nfl player aaron hernandez with first degree murder. new england patriots fired the former tight end almost immediately. prosecutors now say hernandez executed the victim and then tried to destroy evidence. cnn's alina cho is in the massachusetts with the latest. what do we know, alina? >> reporter: chris, good morning. this is certainly not the kind of environment that aaron hernandez is used to. he's waking up in a single person jail cell this morning. a little more than a week ago he was simply a star tight end for the new england patriots. today he stands accused of murder. stone-faced and silent only briefly